EP1083623A1 - Mobiltelefon vom flip-up Typ mit im Klappdeckel installierter Antenne - Google Patents
Mobiltelefon vom flip-up Typ mit im Klappdeckel installierter Antenne Download PDFInfo
- Publication number
- EP1083623A1 EP1083623A1 EP99117889A EP99117889A EP1083623A1 EP 1083623 A1 EP1083623 A1 EP 1083623A1 EP 99117889 A EP99117889 A EP 99117889A EP 99117889 A EP99117889 A EP 99117889A EP 1083623 A1 EP1083623 A1 EP 1083623A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- flip
- portable phone
- flip cover
- type portable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
- H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
- H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
- H04M1/0216—Foldable in one direction, i.e. using a one degree of freedom hinge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/084—Pivotable antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
- H01Q1/244—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas extendable from a housing along a given path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/08—Helical antennas
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
Definitions
- the present invention relates to a flip-up type or folder type portable phone, and more particularly, to an antenna device installed in the flip cover of a flip-up type portable phone or in the folder cover of a folder type portable phone.
- Portable phones are generally grouped into a bar type, a flip type, and a folder type.
- an antenna device is located at a top edge of a body, and under the antenna device are sequentially disposed an ear piece including a speaker, an LCD (Liquid Crystal Display), and a key pad including a plurality of keys.
- a microphone is disposed in a lowermost portion of the body.
- a typical flip-type portable phone is comprised of a body, a flip cover, and a hinge for mechanically connecting the body to the flip cover.
- an antenna device is located at a top edge of the body, and under the antenna device are sequentially disposed an earpiece including a speaker, an LCD, a key pad including a plurality of keys, and a microphone.
- the microphone may be disposed in the flip cover.
- a folder type portable phone (Startac of Motorola) is comprised of a body, a folder cover, and a hinge for mechanically connecting the body to the folder cover.
- an ear piece including a speaker is located in the folder cover and an antenna device is located at a top edge of the body.
- An LCD and a key pad are sequentially disposed under the antenna device, and a microphone is in a lowermost portion of the body.
- a flip-up type is a kind of flip type portable phone, in which hinges are engaged with both sides of an LCD in a body to open or close a flip cover. Hence, the hinges has a rotating shaft at both sides of the LCD.
- hinges of a flip cover are provided at both sides of an LCD module in a body, a speaker is located within the flip cover, and a wire is extended from the speaker and electrically connected to a main board of the body through the hinges. Holes formed in necks of the flip cover defines a path for electrically connecting the flip cover to the main board of the body.
- the flip cover has a rotating shaft at both sides of the LCD module, which is exposed regardless of the opened or closed state of the flip cover.
- the flip cover is so configured as to rotatedly open upward from the body.
- the conventional flip-up type portable phone has limitations in achieving miniaturization and lightweight in view of the current technology level.
- a separately procured antenna device is installed at a top edge of a body, increasing structural complexity.
- Another problem is an inconvenience induced from extending a rod antenna of the antenna device when speech quality is poor with the flip cover opened for a call.
- An object of the present invention is to provide an antenna device installed in a flip cover of a portable phone.
- Another object of the present invention is to provide a convenient antenna device in a portable phone.
- a further object of the present invention is to provide an antenna device in a portable phone, which can be made in various designs.
- an antenna device installed in a flip cover of a flip-up type portable phone.
- a body has an exposed LCD and a main board.
- the flip cover is mechanically connected to the body by hinges and has necks extended from both sides of the flip cover, each of the necks including a hole formed by gas injection, and a groove formed to a predetermined length on a base plate of the flip cover.
- the antenna device has a portion fixed in the groove and a portion inserted into the hole and is electrically connected to the main board of the body. Thus, the antenna device operates upon opening the flip cover.
- FIG. 1 is a perspective view of a flip-up type portable phone according to a first preferred embodiment of the present invention.
- the following description is conducted with the understanding that the present invention is adaptable to a folder type portable phone because the two types are of the same in that the flip cover and the folder cover are opened by hinges, protect key pads, and are flipped up open. Hinges of the flip-up type portable phone are disposed at both sides of an LCD, whereas those of the folder type portable phone are installed at uppermost ends of a body.
- the flip-up type portable phone of the present invention is comprised of a body 100, a flip cover 200, and hinges (not shown) for mechanically connecting the body 100 to the flip cover 200.
- the hinges are installed at both sides of an LCD 112 so that the flip cover 200 is opened around a rotating axis A1.
- the LCD 112 is exposed regardless of the opened or closed state of the flip cover 200.
- An antenna housing 110 is provided at an uppermost end of the body 100, for holding a helical antenna (not shown). Under antenna the housing 110 are sequentially arranged the LCD 112 and a key pad covered with the flip cover 200. A microphone 116 is disposed in a lowermost portion of the body.
- the flip cover 200 includes an antenna device (see FIGs. 2 and 3) and an ear piece having a speaker (see FIGs. 2 and 3) built therein.
- the flip cover 200 has necks 210 extended from both sides thereof and is hinged to the body 100 by use of flip dummies 220.
- FIG. 2 is a perspective view of the flip cover.
- FIGs. 3 and 4 are an exploded perspective view and a partial sectional plan view of the antenna device installed in the flip cover according to the first preferred embodiment of the present invention.
- the flip cover 200 of the present invention is comprised of a speaker 250 and an antenna device 30.
- the flip cover 200 is hinged to the body 100 by use of screws S, insertion holes I, and the flip dummies 220.
- the speaker 250 is fixedly fit into a rib 216 protruding from a base plate of the flip cover 200. Being extended from the speaker 250, wires 251 are directed toward the body 100 through holes 214 formed in the necks 210 of the flip cover 200 by gas injection as well known in the field, and holes 222 formed in cylindrical members 221 of the flip dummies 220.
- the antenna device 30 is a core wire surrounded with an insulating tube, installed in the flip cover 200.
- a groove 212 is formed in the flip cover 200 to receive the antenna device 30.
- a portion 31 of the antenna device 30 is held in the groove 212, and the other portion 32 thereof is inserted into a hole 214.
- the flip cover 200 includes the speaker 250 and the antenna device 30. Both wires 215 are extended from the speaker 250 and directed toward the body 100 through the holes 214 and the flip dummies 220.
- the core wire of the antenna device 30 is electrically connected to a main board of the body 100 through the hole 214 and the flip dummy 220.
- the antenna device 30 is fixed along the groove 212 by an adhesive means like an adhesive tape.
- the portable phone When a user opens the flip cover 200 for a call, the portable phone is automatically set to a speech mode and the antenna device 30 starts to operate.
- the portable phone is very convenient to the user and design and structural simplicity can be obtained, contributing to the increase of productivity.
- FIG. 5 is a perspective view of a flip-up type portable phone according to a second preferred embodiment of the present invention.
- the portable phone is comprised of the body 100, the flip cover 200, and hinges (not shown) for mechanically connecting the body 100 to the flip cover 200.
- the flip cover 200 moves between opened and closed positions around the rotating axis A1.
- a helical antenna (not shown) is held in the antenna housing 110 located at a top edge of the body 100, and a rod antenna (see FIGs. 6 and 7) is installed in the flip cover 200.
- the microphone 116 is arranged in a lowermost portion of the body 100.
- FIGs. 6 and 7 are partial sectional plan views of an antenna device installed in the flip cover with the rod antenna retracted and extended, respectively, according to the second preferred embodiment of the present invention.
- a rod antenna 400 and the speaker 250 are provided in the flip cover 200.
- the rod antenna 400 is extendable/retractable into/from the flip cover 200.
- the speaker 250 is fixedly fit in the rib 216 of the flip cover 200 and the wires 215 are extended from the speaker 250 and connected to a body through the holes 214 of the neck 210. Between a rod antenna and a helical antenna, the rod antenna is generally located in the flip cover.
- the rod antenna 400 is extended/retracted from /into an antenna housing 230 of the flip cover 200.
- the antenna housing 230 is cylindrical and disposed at a side of the flip cover 200.
- the rod antenna 400 makes a linear movement through a metallic antenna bushing 45 secured to an end of the antenna housing 230.
- the rod antenna 400 which has a cap 43 secure to an end thereof, is divided into an insulating portion 41 and a conductive portion 42.
- a metallic stopper 44 is secured to an end of the conductive portion 42.
- the insulating and conductive portions 41 and 42 are located within the antenna housing 230 when the rod antenna 400 is retracted.
- the antenna bushing 45 is a metallic conductor and electrically connected to the main board of the body by a wire 46.
- the wire 46 is directed toward the body through a hole 214 of the neck 210.
- An end of the wire 46 is fixedly soldered to the antenna bushing 45.
- the rod antenna 400 When a user opens the flip cover 200 for a call and transmit/receive sensitivity is poor, the rod antenna 400 is extended and then the antenna device operates.
- FIGs. 8 and 9 are partial sectional plan views of a flip cover having an antenna device installed therein with a rod antenna retracted and extended, respectively, according to a third preferred embodiment of the present invention.
- a rod antenna 500 and a helical antenna 600 are held in the cylindrical antenna hosing 230 of the flip cover 200.
- the rod antenna 500 is comprised of a conducting portion 52 having a stopper 54 secured to an end thereof and an insulating portion 51 having a cap 53 secured to an end thereof.
- An antenna bushing 55 being a metallic conductor is installed at an end portion of the antenna housing 230.
- the helical antenna 600 is supported between an end of the antenna housing 230 and the antenna bushing 55, and the rod antenna 500 is extended/retracted through the helical antenna 600 and the antenna bushing 55.
- An end of the helical antenna 600 makes contact with the antenna bushing 55 and the conducting portion 52 of the rod antenna 500 is electrically connected to the antenna bushing 55 in surface-contact with the antenna bushing 55 when the rod antenna 500 is retracted.
- the insulating and conducting portions 51 and 52 are located within the antenna housing 230.
- the antenna bushing 55 is a metallic conductor and electrically connected to the main board of a body by a wire 251.
- the wire 251 is directed toward the body through a hole 214 of the neck 210.
- An end of the wire 251 is fixedly soldered to the antenna bushing 55.
- the rod antenna 500 When a user opens the flip cover 200 for a call and transmit/receive sensitivity is poor, the rod antenna 500 is extended and then the antenna device operates. When the rod antenna 500 is retracted, the helical antenna 600 acts as a main antenna.
- an antenna device is located within a flip cover in a flip-up type portable phone. Accordingly, the present invention offers the benefits of user friendliness, various designs, and enhanced assembly and productivity. Furthermore, the present invention is adaptable to a folder type portable phone.
- the antenna core wire may be formed integrally with the flip cover during injection molding of the flip cover, or a conductive line is formed into a predetermined shape in the flip cover to function as an antenna.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Support Of Aerials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019980041839A KR100345534B1 (ko) | 1998-10-07 | 1998-10-07 | 플립업타입휴대폰에서플립커버에설치된안테나장치 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1083623A1 true EP1083623A1 (de) | 2001-03-14 |
Family
ID=19553226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99117889A Withdrawn EP1083623A1 (de) | 1998-10-07 | 1999-09-10 | Mobiltelefon vom flip-up Typ mit im Klappdeckel installierter Antenne |
Country Status (4)
Country | Link |
---|---|
US (1) | US6300910B1 (de) |
EP (1) | EP1083623A1 (de) |
KR (1) | KR100345534B1 (de) |
CN (1) | CN1105426C (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8207893B2 (en) | 2000-01-19 | 2012-06-26 | Fractus, S.A. | Space-filling miniature antennas |
US8738103B2 (en) | 2006-07-18 | 2014-05-27 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100678082B1 (ko) * | 1998-12-30 | 2007-05-17 | 삼성전자주식회사 | 폴더 타입 휴대폰에서 메인 보드와 엘씨디 모듈간의연결장치 |
JP4012733B2 (ja) | 1999-09-20 | 2007-11-21 | フラクトゥス・ソシエダッド・アノニマ | マルチレベルアンテナ |
EP1195842B1 (de) * | 2000-01-14 | 2003-10-29 | Mitsubishi Denki Kabushiki Kaisha | Antennenstruktur für tragbares funkgerät |
US7130591B2 (en) * | 2000-06-30 | 2006-10-31 | Matsushita Electric Industrial Co., Ltd. | Cell phone |
DE10063696A1 (de) * | 2000-12-20 | 2002-07-18 | Siemens Ag | Verfahren zur Herstellung eines Gehäuses eines mobilen Kommunikations-Endgerätes, Gehäuse und mobiles Kommunikations-Endgerät |
US6600450B1 (en) | 2002-03-05 | 2003-07-29 | Motorola, Inc. | Balanced multi-band antenna system |
TW560785U (en) * | 2002-10-01 | 2003-11-01 | Toppoly Optoelectionics Corp | Cellular phone without opening a cover for communicating |
US7199761B2 (en) * | 2005-08-10 | 2007-04-03 | Motorola Inc. | Wireless communication device with improved antenna system |
US8188926B2 (en) * | 2008-10-31 | 2012-05-29 | Silicon Laboratories, Inc. | Folded antenna structures for portable devices |
US10756414B2 (en) * | 2017-11-02 | 2020-08-25 | Dell Products, Lp | System and method for operating a living antenna aperture mechanism |
US11069962B2 (en) * | 2018-12-20 | 2021-07-20 | Motorola Solutions, Inc. | Antenna assembly for portable radio |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2601211A1 (fr) * | 1986-07-04 | 1988-01-08 | Mecelec Sa | Combine telephonique portable pour systemes de communications du type public |
EP0323614A2 (de) * | 1988-01-04 | 1989-07-12 | Motorola, Inc. | Drehbarer kontaktloser Antennenschalter und Antenne |
EP0661825A1 (de) * | 1993-12-28 | 1995-07-05 | Nec Corporation | Funkgerät mit rotierender Antenne |
GB2293275A (en) * | 1994-09-15 | 1996-03-20 | Motorola Inc | Two position fold-over dipole antenna |
EP0928092A2 (de) * | 1997-12-29 | 1999-07-07 | SAMSUNG ELECTRONICS Co. Ltd. | Tragbares Klapptelefon und Scharniermechanismus dafür |
WO1999043042A1 (en) * | 1998-02-20 | 1999-08-26 | Samsung Electronics Co., Ltd. | Dual band antenna for radio terminal |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2257835B (en) * | 1991-07-13 | 1995-10-11 | Technophone Ltd | Retractable antenna |
US5170173A (en) * | 1992-04-27 | 1992-12-08 | Motorola, Inc. | Antenna coupling apparatus for cordless telephone |
CN1046380C (zh) * | 1993-05-03 | 1999-11-10 | 摩托罗拉公司 | 用于便携式无线电话的天线 |
IL108358A (en) * | 1993-09-14 | 1997-03-18 | Loral Space Systems Inc | Mobile communication terminal having extendable antenna |
JPH08288725A (ja) * | 1995-04-10 | 1996-11-01 | Sony Corp | アンテナ装置および携帯無線装置 |
US5828343A (en) * | 1996-03-11 | 1998-10-27 | Ericsson Inc. | Antenna connector device for a handheld mobile phone |
KR19980019748A (ko) * | 1996-09-03 | 1998-06-25 | 구자홍 | 프린터 메모리의 효율적 운용 방법 |
US6031495A (en) * | 1997-07-02 | 2000-02-29 | Centurion Intl., Inc. | Antenna system for reducing specific absorption rates |
US5945954A (en) * | 1998-01-16 | 1999-08-31 | Rangestar International Corporation | Antenna assembly for telecommunication devices |
US6011519A (en) * | 1998-11-11 | 2000-01-04 | Ericsson, Inc. | Dipole antenna configuration for mobile terminal |
-
1998
- 1998-10-07 KR KR1019980041839A patent/KR100345534B1/ko not_active IP Right Cessation
-
1999
- 1999-09-09 CN CN99118560A patent/CN1105426C/zh not_active Expired - Fee Related
- 1999-09-10 EP EP99117889A patent/EP1083623A1/de not_active Withdrawn
- 1999-09-22 US US09/400,578 patent/US6300910B1/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2601211A1 (fr) * | 1986-07-04 | 1988-01-08 | Mecelec Sa | Combine telephonique portable pour systemes de communications du type public |
EP0323614A2 (de) * | 1988-01-04 | 1989-07-12 | Motorola, Inc. | Drehbarer kontaktloser Antennenschalter und Antenne |
EP0661825A1 (de) * | 1993-12-28 | 1995-07-05 | Nec Corporation | Funkgerät mit rotierender Antenne |
GB2293275A (en) * | 1994-09-15 | 1996-03-20 | Motorola Inc | Two position fold-over dipole antenna |
EP0928092A2 (de) * | 1997-12-29 | 1999-07-07 | SAMSUNG ELECTRONICS Co. Ltd. | Tragbares Klapptelefon und Scharniermechanismus dafür |
WO1999043042A1 (en) * | 1998-02-20 | 1999-08-26 | Samsung Electronics Co., Ltd. | Dual band antenna for radio terminal |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10355346B2 (en) | 2000-01-19 | 2019-07-16 | Fractus, S.A. | Space-filling miniature antennas |
US9331382B2 (en) | 2000-01-19 | 2016-05-03 | Fractus, S.A. | Space-filling miniature antennas |
US8471772B2 (en) | 2000-01-19 | 2013-06-25 | Fractus, S.A. | Space-filling miniature antennas |
US8558741B2 (en) | 2000-01-19 | 2013-10-15 | Fractus, S.A. | Space-filling miniature antennas |
US8610627B2 (en) | 2000-01-19 | 2013-12-17 | Fractus, S.A. | Space-filling miniature antennas |
US8207893B2 (en) | 2000-01-19 | 2012-06-26 | Fractus, S.A. | Space-filling miniature antennas |
US8212726B2 (en) | 2000-01-19 | 2012-07-03 | Fractus, Sa | Space-filling miniature antennas |
US9099773B2 (en) | 2006-07-18 | 2015-08-04 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US10644380B2 (en) | 2006-07-18 | 2020-05-05 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US8738103B2 (en) | 2006-07-18 | 2014-05-27 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US9899727B2 (en) | 2006-07-18 | 2018-02-20 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US11031677B2 (en) | 2006-07-18 | 2021-06-08 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US11349200B2 (en) | 2006-07-18 | 2022-05-31 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US11735810B2 (en) | 2006-07-18 | 2023-08-22 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
Also Published As
Publication number | Publication date |
---|---|
US6300910B1 (en) | 2001-10-09 |
KR100345534B1 (ko) | 2002-10-25 |
CN1250260A (zh) | 2000-04-12 |
CN1105426C (zh) | 2003-04-09 |
KR20000024987A (ko) | 2000-05-06 |
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